KR200233211Y1 - Apparatus for automatically loading thermoplastic resin to resin carrier used in semiconductor packaging - Google Patents

Abstract

The present invention relates to an apparatus for automatically loading thermoplastic resin (pellets or tablets) in a thermoplastic carrier (jig or rack) to perform a molding process of a semiconductor chip.

Automatic pellet sorting and conveying means; Pellet loading means including a pellet loading tube disposed below the pellet alignment and conveying means and capable of accumulating a plurality of pellets; Pellet indexing means for sorting pellets fed from pellet sorting and conveying means one by one and transferring the pellets to the pellet loading tube; Pellet feeding means comprising an upper pellet supply tube and an upper stopper and a lower stopper; And control means for controlling the means.

By using such a device, the operator does not need to manually load the pellets into the jig by hand, and as a result, the work time required for the molding process during the post-semiconductor process can be shortened. In addition, it is not necessary to move in the height direction (z-axis direction), which not only simplifies the device but also significantly reduces the time required for loading.

Description

Apparatus for automatically loading thermoplastic resin to resin carrier used in semiconductor packaging}

The present invention is to automatically load a thermoplastic resin into a carrier (jig or rack) for moving a plurality of thermoplastic resins (pellets or tablets) with an automatic molding device to perform a molding process with an epoxy resin to protect the semiconductor chip and the network. It relates to a device for.

The semiconductor package is produced through various working processes. The outline of the process is as follows.

First, a die bonding step of attaching a semiconductor chip to a lead frame in the form of a plate or a reel, and after the die bonding, connects the semiconductor chip on the lead frame and a network attached to the lower surface of the lead frame. A wire bonding step for energizing, a step of molding with epoxy resin to protect the semiconductor chip and network after wire bonding, and attaching to a semiconductor package consisting of a semiconductor chip and network in molding after molding After the trimming step of removing the impurities, the forming step of bending the lead of the trimmed semiconductor package, and the singulation step of separating the semiconductor package from the lead frame, the product is finally Is completed.

The present invention is a device necessary for the pre-molding step, in order to coat the thermoplastic resin on the lead frame after the wire bonding, the thermoplastic resin called compound (compound) must be supplied to the molding device. For this purpose, one large compound was previously fed into the mold by hand. In order to alleviate the inconvenience of manual labor, an apparatus for automatically supplying a compound to a molding apparatus has been proposed, and the US Patent No. 5,599,159 and Korean Patent Application No. 94-29020 are related to such an apparatus.

In recent years, however, rather than supplying one large compound, so-called MGP, which places small (about 25 mm in height, about 15 mm in diameter) cylindrical resin masses called pellets or tablets in many molds (Multi-Gang Pot) method is widely used. In case of using MGP molding, it is possible to overcome the wire-sweep phenomenon and the void or non-fill phenomenon, which is a problem in the conventional molding, and to reduce the compound consumption. In that sense, it almost replaces the conventional method of using only one compound.

In such MGP moldings, dozens of small pellets have to be loaded into the pots formed in the mold, in order to solve the trouble of the worker filling the pellets individually, so-called 'jigs' or 'racks'. Use a pellet loading tool called a rack. The jig is a thin plate having dozens of grooves that coincide with the grooves for pellets in the mold, as shown in FIG. 1, in which the operator fills the pellets in the grooves of the jig, places the jig over the mold, and then releases the appropriate lever. Operation causes dozens of pellets in the jig to fall from the jig into the grooves for the pellets in the mold. In other words, it is a tool used to transport a large number of pellets and load them into a mold at once.

In other words, the jig or rack is a lightweight carrier used to feed objects such as leadframes or pellets into the molding apparatus, and is mainly made of aluminum to reduce weight.

In the related art, since the worker had to load dozens of pellets into the jig one by one, the tiredness of the worker could occur. In addition, when one person actually performs several operations (lead frame loading, decal process, operation of automatic lead frame loading device, etc.) at the same time, the time spent due to pellet loading in the jig occurs and productivity is increased. Will cause a decrease.

The present invention is conceived in this respect, it is designed to improve the overall productivity by reducing the working time by the automatic loading of pellets in the jig and for the convenience of the operator.

Hereinafter, in the description of the present invention, 'pellet' among various terms representing the thermoplastic resin for semiconductor packaging and 'jig' among various terms representing the carrier of the thermoplastic resin for semiconductor packaging use. However, the present invention is not limited to these terms.

An object of the present invention is to provide a thermoplastic resin automatic loading device into a thermoplastic resin carrier for semiconductor packaging.

Another object of the present invention is to provide an apparatus for automatically loading pellets used in leadframe molding into a jig.

Another object of the present invention, unlike the conventional pick-and-place pellet automatic loading device, by using the upper and lower pellet loading and feeding tube does not need to move in the vertical direction It is to provide an automatic pellet loading device.

1 is a view schematically showing a conventional molding operation process.

2 and 3 are a plan view and a front view schematically showing the overall configuration of the device according to the present invention.

4 shows the configuration of the pellet loading means in detail, and shows a front view (lower left side), a side view (lower side), and a plan view (upper right side).

FIG. 5 shows the configuration of a pellet supply tube and a stopper among a portion of the pellet supply means.

6A and 6B are a plan view (Fig. 6A) and a front view (Fig. 6B) showing the configuration of the pellet indexing means in detail.

** Description of codes for main parts of drawing codes **

110: pellet 120: jig

200: pellet sorting and conveying means 210: hopper

220: bowl feeder 230: linear feeder

300: pellet indexing means 310: pellet gripping portion

320: pellet holding part fixing block 330: air cylinder

340: Pellet Gripping Sensor

400: pellet loading means 410: pellet loading tube

420: reversible motor 430: pellet level detection sensor

440: pellet pusher (pusher) 460: pellet pusher fixed block

500: pellet feed means 510, 520: x, y axis guide rail

511, 512: x, y axis servomotor 512,522: x, y axis ball screw

530: pellet feed tube 540: pellet feed tube fixing block

560: upper stopper 570,570 ': lower stopper

580: Pellet Release Detection Sensor

In order to achieve the above object, the device according to the present invention has the following configuration.

Automatic pellet sorting and conveying means; A pellet loading tube disposed under the pellet alignment and conveying means and capable of stacking a plurality of pellets, a pellet pusher disposed inside the pellet loading tube and connected to an external motor to move up and down within the tube; Pellet loading means comprising a motor for moving the pellet pusher up and down the tube, and a pellet level detection sensor mounted on a part of the tube to sense whether the pellet is loaded; Pellet indexing means for sorting pellets fed from pellet sorting and conveying means one by one and transferring the pellets to the pellet loading tube; An xy two-dimensional positioning robot, an upper pellet supply tube connected to the positioning robot, an upper stopper mounted inside and outside the pellet supply tube, and a lower stopper, the pellet loaded from the pellet loading tube A pellet supply means for receiving and loading and being guided to the upper portion of each of the pellet grooves formed in the jig by the positioning robot, and then loading the pellets into the pellet grooves of the jig one by one; And control means for controlling the means.

The control means, when a predetermined number of pellets are loaded into the pellet loading tube, moves the pellet supply tube to a position aligned with the pellet loading tube, transfers the pellets in the pellet loading tube to the pellet supply tube, and The pellet feed tube is sequentially moved to the top of the pellet groove of the jig to insert the pellet into the groove.

The automatic pellet sorting and conveying means guides the pellet indexing means to a hopper for feeding a plurality of pellets, and a bowl feeder for sorting and sorting the pellets fed from the hopper while vibrating. Can be made with a linear feeder

The pellet loading means, whenever the pellets are loaded into the tubes one by one, the sensor detects this and runs the motor for a certain time to lower the pellet pusher by the height of the added pellets. In addition, if a predetermined number of pellets are loaded into the tube, the detector detects this, aligns the pellet supply tube with the pellet loading tube, and then moves the pellet pusher up to the end, thereby moving the pellet of the pellet loading tube to the pellet supply tube. Let's do it.

The positioning robot of the pellet feed means moves the pellet feed tube to the desired (x, y) coordinates, and is connected to the x-axis guide rail, the x-axis servo motor, and the x-axis servo motor to rotate the x-axis ball screw. screw), x-axis drive unit composed of x-axis moving block where y-axis servomotor is located, y-axis composed of y-axis guide rail, y-axis servo motor and y-axis ball screw connected to y-axis servo motor and rotating Consists of a drive unit, it is possible to move the pellet feed tube attached to the y-direction rail of the robot to an arbitrary (x, y) position by the position control of the servomotor.

The pellet indexing means includes a pellet gripping portion for holding pellets one by one, a pellet gripping sensor for grasping whether the pellet is held in the pellet gripping portion, and a pellet gripping portion for moving the pellet gripping portion to the top of the pellet loading tube. By the movement means, the pellets supplied from the linear feeder serve to transfer the pellet loading tubes one by one. The pellet gripping portion moving means comprises an air cylinder for reciprocating the pellet gripping portion fixing block and the pellet gripping portion fixing block.

The upper and lower stops mounted inside and outside the pellet feed tube are used to drop the pellets one by one when the pellet feed tube moves to the top of the pellet groove of the jig. That is, the gap between the upper stop and the lower stop has a gap of more than one pellet height, and when the pellet feed tube moves to the top of the pellet groove of the jig, the lower stop is released to remove one pellet between the two stops. Drop it into the groove. At this time, the upper stopper stops the pellets so that other pellets loaded thereon do not fall between the upper and lower stoppers. Then, the lower stop is activated while the pellet feed tube moves to the other groove, and the upper stop is deactivated so that one pellet is loaded into the tube space between the upper and lower stops, and then moved to the top of the next groove. After that, the pellet is dropped into a new groove by the above-described operating method. Such a stop may be implemented by an air cylinder using pneumatic pressure, but is not limited thereto.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 schematically illustrates a conventional molding operation. Pellet loading operation and molding operation by jig by hand, the operator loads the pellet 110 by hand into the pellet groove 122 formed in the jig 120 by hand, then the jig for molding Move to the lower mold 111. After the jig is aligned so that the pellet grooves 122 of the jig are aligned with the pellet grooves 113 of the lower mold, the pellet release lever (not shown) near the handle is operated. The pellet is fed to the lower mold by leaving the) and falling into the groove for pellets of the lower mold. After the pellets are supplied to the mold, molding is performed by pressing two press plates (top plate) 115 and the moving plate 116 guided by the guide post 117 using the transfer cylinder 114. According to this conventional method, since the worker has to manually load the pellets into the jig by hand, it takes a lot of work time and reduces the work efficiency of the worker.

2 and 3 show a plan view and a front view of the device according to the present invention, and schematically shows the overall configuration of the device for automatically loading pellets into a jig.

Largely as an overall component, pellet alignment and conveying means 200, pellet indexing means 300, pellet loading means 400 and pellet feeding means 500 are shown, and control means are not shown. In addition, a jig 120 to which pellets are supplied is illustrated, and the illustrated jig is provided with a total of 30 pellet grooves.

Pellet sorting and conveying means 200 is a hopper 210 for inputting a plurality of pellets, a bowl feeder 220 for sorting out the defective pellets while vibrating and sorting the selected pellets and feeding them into a linear feeder; It consists of a linear feeder 230 which guides the pellets 110 arranged vertically into the pellet indexing means 200. Bowl feeders and linear feeders are devices commonly used for sorting and sorting many small objects, and thus detailed descriptions thereof will be omitted.

The pellet indexing means 300 includes a pellet gripping part 310, a pellet gripping sensor (not shown) for determining whether the pellet is held in the pellet gripping part, a pellet gripping part fixing block 320, and a pellet gripping part fixing block. It consists of an air cylinder 330 for reciprocating movement. The pellet indexing means is used to grasp the pellets 110 supplied from the linear feeder 230 one by one and load them into the pellet loading tube 410, the detailed configuration of which is shown in FIG. 6.

The pellet loading means 400 receives the pellets supplied from the pellet indexing means 300 one by one, loads the pellets into the pellet loading tube 410, and when a predetermined number of pellets are loaded, the loaded pellets are connected to the xy robot. To the pellet feed tube 530. Such pellet loading means 400 will be described in detail with reference to FIG. 4.

The pellet supply means 500 is used to load a plurality of pellets into pellet grooves of the jig 120 in order. The pellet supply tube 530 connected to the xy robot driven and controlled by a servo motor is provided. After receiving and storing a plurality of pellets from the pellet loading tube 410, when the pellet supply tube 530 moves to the top of the pellet groove under the control of the xy robot, the pellets drop one by one so that the pellet groove of the jig It is used to feed pellets.

The pellet supply means is composed of an x-y two-dimensional positioning robot, an upper pellet supply tube connected to the robot, an upper stopper mounted inside and outside the pellet supply tube, and a lower stop.

The above-mentioned positioning robot moves the pellet feed tube to a desired (x, y) coordinate and rotates in connection with an x-axis guide rail 510, an x-axis servomotor (511 in FIG. 3), and an x-axis servomotor. Connected to the x-axis driving unit including an x-axis ball screw 512 and an x-axis moving block 514, a y-axis guide rail 520, a y-axis servomotor 521, and a y-axis servomotor. It consists of the y-axis drive part which consists of a rotating y-axis ball screw 522. The y-axis servomotor is mounted on the x-axis moving block 514 and the x-axis moving block 514 is connected to the x-axis ball screw 512, so that the ball screw rotates by the rotation of the x-axis servo motor. Therefore, it moves to the left and right (x direction) on the x-axis guide rail 510.

Meanwhile, as will be described later, the pellet supply tube fixing block 540 is connected to the y-axis ball screw 522 to fix the pellet supply tube according to the rotation of the y-axis servomotor 521 and the rotation of the ball screw 522. The block 540 and the pellet supply tube 530 fixed thereto may move up and down (y direction) along the y-axis guide rail 520.

Therefore, by using this positioning robot, the pellet supply tube 530 can be moved on arbitrary (x, y) coordinates by controlling two servomotors. In the embodiment of the present invention, the position is selected using Mitsubishi's HC-PQ23 servomotor, MR-C20A motor driver, RORZE's RC233 motor controller, KURODA's GE1520AS-BALR-600A and 900A ball screw, and THK's HSR15R2UU + 720L guide rail. Although the robot is implemented, it is not limited to these specifications. Such a two-dimensional positioning robot is widely used in other fields, the detailed description thereof will be omitted.

4 shows the configuration of the pellet loading means 400 in detail, and a front view (lower left side), a side view (lower side), and a plan view (upper right side) are provided.

The pellet loading means 400 is used to receive a plurality of predetermined pellets by receiving the pellets supplied from the pellet indexing means one by one, the pellet loading tube 410 extending in the vertical direction and the inside of the pellet loading tube A pellet pusher 440 that can move up and down, a reversible motor 420 for driving the pellet pusher up and down, and a pellet level sensor 430 are shown.

In addition, the pellet pusher fixing block 460 is fixed to the pellet pusher, and is held by a ball screw 480 connected to the shaft of the motor 420 via the coupling 490, so that the motor rotates as the motor rotates. By moving up and down along the linear guide rail 450, the pellet pusher 440 can be moved up and down the pellet loading tube.

In addition, the upper limit sensor 470 and the lower limit sensor 470 'may be additionally provided at the upper and lower ends of the pellet loading tube, and the limit sensor is for limiting the movement range of the pellet pusher, and the pusher Detects the ascending or descending above a certain height to prevent further vertical movement.

The pellet detection sensor 430 is for detecting whether pellets exist in the loading tube 410 having a height where the sensor is installed, and lowers the pellet pusher 440 by the height of the pellet every time the pellets are inserted one by one. To do that. In this way, the pellet pusher is lowered step by step by using a sensor every time the pellet is injected, thereby preventing pellet breakage, etc., generated when dropped from a high place.

The pellet level sensor 430 and the upper and lower limit sensors 470 and 470 'used in this embodiment are proximity sensors, which detect whether there is an object that forms an electromagnetic field and deforms the form of the electromagnetic field. The electromagnetic field sensor was used, and specifically, PS12-2DN and CR18-8DN model sensors of AUTONICS were used.

5 shows a part of the pellet feeding means, the pellet feeding tube and the stopper.

The pellet feed tube 530 is fixed to the feed tube fixing block 540, and the fixing block 540 is held in the y-axis ball screw 522 (see Figs. 2 and 3). Thus, the pellet feed tube 530 can move on any (x, y) coordinates according to the operation of the x, y servomotors 511, 521 and the x, y ball screws 512, 522.

In this embodiment, one upper stop 560 and two lower stops 570 are provided. The upper and lower stops are air cylinder type stops, and the control means applies a signal to a solenoid valve (not shown), and acts on the principle of advancing and contracting the axis of the cylinder by applying or releasing air pressure to the cylinder.

When the pellet feed tube 530 is aligned with the top of the pellet groove of the jig (not shown), the lower stop releases the operation, thereby dropping the pellet contained between the upper and lower stops into the pellet groove of the jig. At this time, the upper stop prevents the pellet from falling down between the upper and lower stops. The upper stop deactivates while the pellet feed tube 530 moves to the next groove of the jig, allowing one pellet to descend between the upper and lower stops, during which the lower stop prevents the pellets from falling out of the tube. prevent. In other words, the upper and lower stops are alternately activated and deactivated so that the pellets are stably supplied to the pellet grooves of the jig one by one. In addition, in the present embodiment, by providing two lower stops 570, the pellets are stably dropped in a horizontal state.

In addition, a pellet release detection sensor 580 may be provided at the bottom of the pellet supply tube 530 to detect whether the pellet is completely separated from the tube and loaded into the pellet groove of the jig. The pellet release sensor 580 used in the present invention was a light transmitting photoelectric sensor having a light transmitting portion and a light receiving portion separated from each other, and used SUNX's FT-P2 model.

Thus, when using the pellet feed means 500 of the upper and lower stops and the tube form, the z-axis direction (height direction), unlike the conventional pick-and-place robot loading means This eliminates the need for movement, which not only simplifies the configuration of the device but also significantly reduces work time.

6A and 6B are a plan view (Fig. 6A) and a front view (Fig. 6B) showing the configuration of the pellet indexing means in detail.

As shown in FIG. 6A, the pellet indexing means 300 has a c-shape in which the width and depth of the portion for gripping the pellets are slightly larger than the radius of the pellet in order to grasp the pellets fed side by side from the linear feeder 230 (indicated by the dotted lines). Pellet gripping portion 310 of the, and is attached to both ends of the pellet gripping portion 310 is provided with a pellet gripping sensor 340 for detecting whether the pellet is inserted into the U-shaped groove of the pellet gripping portion. In the present embodiment, as the pellet gripping sensor 340, a light transmitting photo sensor, specifically, a SH-21 model of SUNX Corporation was used.

The pellet gripping portion 310 is attached and fixed to the pellet gripping portion fixing block 320, and the pellet gripping portion fixing block 320 is fitted to the shaft 360 fixed to the lower fixing plate 350, thereby providing an air cylinder. By applying and releasing pneumatic pressure to the 330, the pellet gripper fixing block 320 and the pellet gripper 310 fixed thereto can be reciprocated up and down in FIG. 6A along the axis 350.

When it is confirmed that the pellet is inserted into the pellet gripping portion by the pellet gripping sensor 340, the control means applies a pneumatic pressure to the air cylinder 330 to pellet the pellet gripping portion 310 and the pellet gripping portion fixing block 320 The pellets that are gripped at the moment when the U-shaped inner groove of the pellet holding portion 310 and the pellet loading tube 410 are aligned are loaded into the pellet loading tube 410. After the pellet has fallen from the pellet gripping portion and is loaded into the pellet loading tube 410, the air cylinder of the air cylinder is released (for single-acting cylinders) or reverse pneumatic (for double-acting cylinders) to return the pellet indexing means to its original position. Let's do it.

While the pellet is gripped and moved to the pellet loading tube and dropped into the tube, the side of the pellet gripping block blocks the linear feeder 230 to prevent the pellet from advancing.

Looking at the overall operating method of the device according to the present invention based on the accompanying drawings as follows.

When the operator mounts the jig 120 to the apparatus according to the present invention, puts a plurality of pellets into the hopper 210, and operates the apparatus, the pellets are formed by the bowl feeder 220, which is a pellet alignment and transfer means. It is properly sorted and arranged to move toward the pellet indexing means through the linear feeder 230.

When the pellet gripper 310 constituting the pellet indexing means 300 grips the pellets 110 one by one, the pellet grip sensor 340 detects this and operates the air cylinder 330 to load the pellets. Transfer to tube 410 and drop into the pot of pellet loading tube.

When one pellet is inserted into the pellet loading tube 410, the pellet level sensor 430 detects this and moves the pellet pusher 440 down one step (by the height of the pellet). When a predetermined number of pellets (10 in this embodiment) are accommodated in the pellet loading tube by the repeated operation of the pellet indexing means, the pellet pusher 440 is moved to the top, whereby the pellet loading tube 410 is already on the top. All 10 pellets are transferred into the pellet feed tube 530 which is aligned in the.

The pellet feed tube 530 is controlled by the xy positioning robot and moves to the upper part of the jig for pellets, and the pellets are grooved one by one by the operation of the upper and lower stoppers 570 and 570 'described above. Is dropped. While ten pellets are sequentially inserted into the grooves for pellets of the jig, ten pellets are fed and loaded again into the pellet loading tube.

When the next ten pellets are loaded into the pellet loading tube 410, the pellet feed tube 530 is controlled to complete the pellet feed into the jig and move back to the top of the pellet loading tube for alignment. Therefore, the pellet supply to the jig can be made continuously, and the working time can be greatly shortened.

When all the pellets are loaded into the pellet groove of the jig, the worker separates the jig from the apparatus and moves to the molding apparatus. At this point, the pellet loading tube 410 or the pellet supply tube 530 has already been installed for the next operation. Pellets are housed. Therefore, it takes time to fill the pellet loading tube only at the beginning of the first operation, and the operation thereafter may be performed continuously.

The control means (not shown) of the present invention is for performing the overall control described above, can be implemented by a circuit according to the prior art, in the present embodiment, a PLC unit (COM unit of OMRON's CS1G-CPU43 model, Power unit of 200HW-PA204S model, PLC link unit of CS1W-SCB21 model, input unit of ID-212 model, output unit of OC-212 model). The programmable logic controller (PLC) uses logic, sequencing, timing, and count to control various types of machines and processors using digital or analog input / output modules. Refers to a control device that performs digital operation using a programmable memory (EPROM) that internally stores a command for performing a special function such as a calculation, and the like, and has a general knowledge in the technical field to which the present invention belongs. Since the self can be easily implemented according to the prior art, a detailed description thereof will be omitted.

In addition, the device according to the present invention may further comprise suitable display means for displaying the operation process or other information to the operator, if necessary.

By using the pellet automatic loading device of the jig according to the present invention, it is convenient because the operator does not need to manually load the pellet into the jig by hand, and as a result, the work time required for the post-semiconductor process can be significantly shortened.

In addition, by providing a pellet loading means and pellet supply means in the form of tubes, a plurality of pellets can be loaded into pellet grooves of a jig continuously, and the pick-and-place type of automatic Unlike the stacking device, there is no need to move in the height direction (z-axis direction), which not only simplifies the device but also significantly reduces the time required for loading.

Claims (4)

Automatic pellet sorting and conveying means; A pellet loading tube disposed under the pellet alignment and conveying means and capable of accumulating a plurality of pellets, and a pellet pusher disposed inside the pellet loading tube and connected to an external motor to move up and down within the tube. And a pellet loading means comprising a motor for moving the pellet pusher up and down the tube, and a pellet level detection sensor mounted on a part of the tube to detect whether the pellet is loaded; Pellet indexing means for classifying pellets fed from the pellet sorting and conveying means one by one and feeding the pellets into the pellet loading tube; An xy two-dimensional positioning robot, an upper pellet supply tube connected to the positioning robot, an upper stopper mounted inside and outside the pellet supply tube, and a lower stopper, the pellet loaded from the pellet loading tube A pellet supply means for receiving and loading and being guided to the upper portion of each of the pellet grooves formed in the jig by the positioning robot, and then loading the pellets into the pellet grooves of the jig one by one; And And a control means for controlling the means. A thermoplastic resin (pellet) automatic loading device to a thermoplastic resin carrier for semiconductor molding. The method of claim 1, The pellet indexing means includes: a pellet gripping portion for holding pellets one by one; a pellet gripping sensor for grasping whether the pellet is held in the pellet gripping portion; It is made up of branch transportation means, The pellet gripper moving means is composed of an air cylinder for reciprocating the pellet gripper fixing block and the pellet gripper fixing block, Automatic pelletizer (pellet) loading device to the thermoplastic resin carrier for the semiconductor molding, characterized in that for conveying the pellets from the pellet aligning and conveying means one by one pellet loading tube. The method according to claim 1 or 2, The upper stop is operated by an air cylinder attached to one radial side of the pellet supply tube, the lower stop is operated by an air cylinder attached to both radial sides of the pellet supply tube, The one upper stop and two lower stops are spaced apart in the vertical direction by a distance greater than one pellet height and less than two pellets height. The pellet supply means, And a pellet release sensor disposed at the bottom of the pellet feed tube and detecting whether the loaded pellet is completely separated from the tube. The method according to claim 1 or 2, The automatic pellet sorting and conveying means guides the pellet indexing means to a hopper for feeding a plurality of pellets, and a bowl feeder for sorting and aligning the pellets fed from the hopper while vibrating. A thermoplastic resin (pellet) automatic loading device into a thermoplastic resin carrier for semiconductor molding, characterized by comprising a linear feeder.